CN113931061A - Prefabricated assembled pier with replaceable components and construction method thereof - Google Patents
Prefabricated assembled pier with replaceable components and construction method thereof Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
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Abstract
The invention relates to a prefabricated assembly pier with replaceable components and a construction method thereof, wherein the prefabricated assembly pier with the replaceable components is characterized in that: the prefabricated steel pipe concrete pier body is characterized by comprising a bearing platform with a reserved cup foundation and a prefabricated steel pipe concrete pier body inserted into the reserved cup foundation, wherein a pre-buried steel plate is arranged at the bottom of the bearing platform cup foundation so as to meet the requirement of local pressure bearing of the prefabricated steel pipe concrete pier bottom, a plurality of high-strength connecting lug plates are welded on a bottom section above the bearing platform of the prefabricated steel pipe concrete pier body, the high-strength connecting lug plates are connected with a replaceable anchoring-connecting assembly through high-strength bolts, and the replaceable anchoring-connecting assembly is connected with an anchoring bottom steel plate pre-buried in the bearing platform through high-strength bolts; the invention has simple structure and design and definite structural stress, can ensure that the pier stud has enough strength, rigidity and energy consumption capability, and has the characteristics of being replaceable and quickly recovering functions after being damaged by strong shock.
Description
Technical Field
The invention belongs to the technical field of design and construction of bridge engineering prefabricated assembled piers, and particularly relates to a prefabricated assembled pier with replaceable components and a construction method thereof.
Background
The bridge prefabrication assembly construction can accelerate the bridge construction speed, improve the construction quality, avoid erecting supports and templates on site, reduce the influence of construction on the environment and the existing traffic, and has wide application prospect.
At present, the prefabrication and assembly construction technology of the bridge superstructure tends to be mature, however, the bridge pier is used as one of main bearing and lateral force resisting members of the bridge structure, and how to ensure that the prefabricated and assembled bridge pier has the performance of an integral cast-in-place bridge pier is a problem which needs to be solved for realizing the full prefabrication and assembly construction of the bridge superstructure and substructure; the traditional prefabricated pier stud assembling process comprises the following steps: grouting sleeve connection, grouting metal corrugated pipe connection, socket joint type connection, slot type connection, post-tensioned prestressed rib connection, flange connection and the like, but the conventional connection structure has the problems of difficult construction, difficult grouting quality detection, poor energy consumption capability under the action of an earthquake, difficult repair after earthquake damage and the like, and the development and application of the construction technology of the fully prefabricated assembled bridge are limited, particularly the popularization and application in high-intensity earthquake areas.
In recent years, the structural seismic design concept has been developed from seismic resistance, seismic isolation and reduction to post-seismic restorable design; the design of the earthquake-proof with the recoverable function requires that the structure can be recovered to be normally used without repair or slight repair after the earthquake, thereby reducing the influence caused by functional interruption after the earthquake; the earthquake-resistant structure with the function of restoration has various realization methods in structural form, and mainly comprises swinging and self-resetting piers, piers with replaceable energy consumption devices and the like in the assembled piers; the swinging and self-resetting bridge pier utilizes the swinging of the bridge pier in the earthquake to provide self-resetting load through the self weight or the prestress of the structure, thereby effectively controlling and reducing the residual displacement of the bridge pier after the earthquake, but simultaneously reducing the energy consumption capability of the bridge pier; from the current research situation of a structural system of a replaceable component of bridge engineering, domestic and foreign researches mainly focus on a double-column pier-BRB and double-column pier-shear energy-consuming steel connecting beam structural system, but the double-column pier-BRB and double-column pier-shear energy-consuming steel connecting beam structural system is only effective in transverse bridge direction earthquake resistance and generally cannot solve the problem of longitudinal bridge direction earthquake resistance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the prefabricated assembled pier with replaceable components, which has simple structural design and definite structural stress, can ensure that the pier has enough strength, rigidity and energy consumption capability, and has the characteristics of being replaceable and quickly recovering functions after being damaged by strong shock.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention provides a prefabricated assembled pier with replaceable components, which is characterized in that: the prefabricated steel pipe concrete pier body is characterized by comprising a bearing platform with a reserved cup foundation and a prefabricated steel pipe concrete pier body inserted into the reserved cup foundation, wherein a pre-buried steel plate is arranged at the bottom of the bearing platform cup foundation so as to meet the requirement of local pressure bearing of the prefabricated steel pipe concrete pier bottom, a plurality of high-strength connecting lug plates are welded on a bottom section above the bearing platform of the prefabricated steel pipe concrete pier body, the high-strength connecting lug plates are connected with a replaceable anchoring-connecting assembly through high-strength bolts, and the replaceable anchoring-connecting assembly is connected with an anchoring bottom steel plate pre-buried in the bearing platform through high-strength bolts;
the replaceable anchoring-connecting assembly comprises a circular high-strength steel plate and a soft steel connecting lug plate, and the soft steel connecting lug plate is vertically welded on the surface of the circular high-strength steel plate; the circular high-strength steel plate is formed by splicing a plurality of equally divided circular steel plates, at least one soft steel connecting lug plate is vertically welded on each circular steel plate, and bolt holes which are arranged in an annular array are distributed in the circular high-strength steel plate, so that the circular high-strength steel plate can be conveniently connected with an anchoring bottom steel plate which is pre-buried in a bearing platform through bolting; the soft steel connecting lug plates are correspondingly connected with the high-strength connecting lug plates one by one through bolts;
the anchoring bottom steel plate pre-embedded in the bearing platform is formed by processing a high-strength steel plate, and bolt holes arranged in an annular array are formed in the anchoring bottom steel plate; the high-strength nut sleeves are arranged at positions corresponding to the bolt holes and are connected with the bottom surface of the anchoring bottom steel plate in a welding mode, the high-strength nut sleeves and the bottom surface of the anchoring bottom steel plate are embedded in the bearing platform together, the bolt holes arranged in the anchoring bottom steel plate and the circular steel plate are arranged in the same mode, the anchoring bottom steel plate and the circular steel plate correspond to each other one by one, and bolts of the anchoring bottom steel plate and the circular steel plate can penetrate into the high-strength nut sleeves to be locked and fixed conveniently.
Further, the prefabricated concrete filled steel tube pier body is prefabricated in a whole length mode or in a segmented mode, and different segments prefabricated in a segmented mode are connected through flanges or welded.
Furthermore, a moving-out groove is arranged between the adjacent equally divided annular steel plates, so that the installation or the replacement is convenient; the soft steel connecting lug plate is made of a low-yield-point steel plate, the soft steel connecting lug plate and the high-strength connecting lug plate are trapezoidal, the soft steel connecting lug plate and the high-strength connecting lug plate are closely arranged, and reliable connection is achieved through bolt holes in the soft steel connecting lug plate and the high-strength bolts.
Furthermore, a sufficient gap is reserved between the bottom of the high-strength connecting lug plate and the upper surface of the circular high-strength steel plate;
the bottom of prefabricated steel pipe concrete mound is provided with a storehouse steel sheet, it has pitch hemp cut bed course to fill between storehouse steel sheet and the pre-buried steel sheet, at the prefabricated steel pipe inner wall welding a plurality of annular stiffening steel sheet of the engaging lug board position that excels in.
Furthermore, a 45-degree chamfer angle is required to be arranged on the peripheral concrete of the anchoring bottom steel plate pre-embedded in the bearing platform during pouring, so that the anchoring-connecting assembly can be lifted and moved out in the later replacement process; after the installation of the anchor-connecting assembly is completed, a waterproof joint compound may be poured along the chamfer.
Furthermore, the cup base reserved on the upper portion of the bearing platform and allowing the prefabricated steel pipe concrete pier body to be inserted and installed is in the same shape as the prefabricated steel pipe concrete pier body, a certain gap is reserved between the cup base and the prefabricated steel pipe concrete pier body, and the gap between the prefabricated steel pipe concrete pier body and the cup base is completely filled with asphalt hemp cut knife materials.
Furthermore, the circular high-strength steel plate is formed by splicing four annular steel plates which are divided into four equal parts, and two soft steel connecting lug plates are vertically welded on each annular steel plate.
The construction process of the construction method of the prefabricated assembled pier with the replaceable components is divided into two situations of newly-built bridges and the situation that the existing bridges are damaged after earthquake and need to be replaced, and the specific implementation scheme is mainly characterized by comprising the following steps:
for a newly-built bridge, the main implementation scheme and process are as follows:
(1) constructing a bearing platform at the bottom of the prefabricated concrete-filled steel tube pier, binding a steel bar of the bearing platform, accurately lofting, installing an anchoring bottom steel plate and an embedded steel plate which are embedded in the bearing platform and relevant embedded parts of the embedded steel plate, installing a bearing platform template, pouring bearing platform concrete and maintaining to the strength required by design, and performing prefabrication of a prefabricated concrete-filled steel tube pier body and processing of an anchoring-connecting assembly in a parallel operation mode in the construction process of the bearing platform;
(2) constructing asphalt hemp cutter cushion layers at the bottom and on the inner side wall of the base of the cup opening of the bearing platform;
(3) after the prefabricated concrete filled steel tube pier body is hoisted in place, the gaps on the periphery are filled up by using an asphalt hemp cutter, and a temporary support frame is erected around the pier body so as to ensure the stability of the pier in the installation process;
(4) installing a replaceable anchoring-connecting assembly, and sequentially screwing the high-strength bolt between the annular high-strength steel plate and the anchoring bottom steel plate and the high-strength bolt between the soft steel connecting lug plate and the high-strength connecting lug plate;
(5) installing the upper structure of the bridge, constructing a bridge deck system and other accessory facilities.
For the case of damage after earthquake and need replacement, the main implementation scheme is as follows:
(1) judging whether the soft steel connecting lug plate needs to be replaced or not according to the damage condition of the soft steel connecting lug plate, and performing the following treatment on the part needing to be replaced;
(2) temporary oblique supports are erected around the steel pipe concrete pier body, so that the safety and stability of the pier body in the replacement process are guaranteed;
(3) the high-strength bolt between the soft steel connecting lug plate and the high-strength connecting lug plate is removed aiming at a certain soft steel connecting lug plate needing to be replaced;
(4) dismantling the high-strength bolt between the annular high-strength steel plate and the anchoring bottom steel plate of the anchoring-connecting assembly;
(5) installing an inserting type lifting hook by using a reserved bolt hole on the soft steel connecting lug plate or symmetrically welding lifting lugs on the circular high-strength steel plate, and lifting off the surface of the bearing platform by using a crane and then moving out;
(6) and hoisting a new anchoring-connecting assembly, and sequentially screwing the high-strength bolt between the annular high-strength steel plate and the anchoring bottom steel plate and the high-strength bolt between the soft steel connecting lug plate and the high-strength connecting lug plate to complete the replacement of the anchoring-connecting assembly.
Compared with the prior art, the invention has the following beneficial effects: in the aspect of structure, the prefabricated concrete-filled steel tube pier body is inserted into a cup opening foundation of a bearing platform to form a simple pier bottom hinged joint structure, the replaceable anchoring-connecting assembly is connected with the prefabricated concrete-filled steel tube pier body and the bearing platform through high-strength bolts, the structural design is simple, the installation and the replacement are easy, and the technical problems that the conventional prefabricated assembled pier connecting structure is difficult to construct and the grouting quality is difficult to detect are solved; in the design aspect, the concrete-filled steel tube pier body is designed according to the conventional concrete-filled steel tube pier, the structural stress is clear, and the pier column can be ensured to have enough strength, rigidity and energy dissipation capacity; particularly, when the steel tube concrete pier is subjected to strong shock, the soft steel connecting lug plate firstly yields and consumes energy, and is used as a 'sacrificial part' and an 'energy consumption part' to ensure that the steel tube concrete pier body is not damaged or only slightly damaged; after the earthquake, judging whether the soft steel connecting ear plate needs to be replaced according to the damage condition of the soft steel connecting ear plate, and for the soft steel connecting ear plate needing to be replaced, only erecting a temporary inclined support, detaching a high-strength bolt between the anchoring-connecting assembly and the prefabricated pier body and the bearing platform, hanging out a replaceable component, moving out the reserved groove, then hanging a new replaceable component, and screwing the connecting bolt according to requirements to complete the replacement; the replacement process is safe, convenient and efficient, the quick recovery of the using function of the bridge after the earthquake can be realized, and the problems that the conventional prefabricated assembled pier is poor in energy consumption capability under the earthquake action, is not easy to repair after the earthquake damage and the like are solved.
Drawings
Fig. 1 is an overall structure view of a pier of the present invention;
FIG. 2 is a top view of the overall structure of a bridge pier according to the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is a broad view of a partial connection configuration of the present invention;
FIG. 5 is a top view of the anchor-connecting assembly of the present invention;
FIG. 6 is a top view of an anchoring bottom steel plate pre-embedded in the bearing platform of the present invention;
description of reference numerals:
1-a steel pipe concrete pier body; 2-high-strength connecting ear plates;
3, annular stiffening steel plates; 4, a circular high-strength steel plate;
5, anchoring a bottom steel plate; 6, connecting the soft steel with the lug plate;
7-high-strength nut sleeve; 8-high strength bolt;
9-high strength bolt; 10-a pitch hemp cutter;
11-bearing platform (with cup base); 12-embedding a steel plate on a cup rim base;
13-sealing a bin steel plate; 14, anchoring the concrete chamfer on the periphery of the bottom steel plate;
15-waterproof joint compound; 16-a screw cap;
17-core concrete; and 18, steel pipes.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
With reference to fig. 1 and 2, the embodiment provides a prefabricated assembled pier with replaceable components, which comprises a bearing platform 11 with a reserved cup foundation and a prefabricated concrete-filled steel tube pier body 1 inserted into the reserved cup foundation, wherein the cross section of the cup foundation is equivalent to that of the concrete-filled steel tube pier body 1, an embedded steel plate 12 is arranged at the bottom of the cup foundation to meet the requirement of local pressure bearing of the pier bottom, and a gap between the concrete-filled steel tube pier body 1 and the cup foundation is filled with an asphalt hemp knife 10 (the asphalt hemp knife is used by a building cementer to mix mud and lime inside to prevent cracking and reinforce, and the old hemp rope is pumped into flocculent hemp clusters by a hemp machine or bamboo strips during manufacturing, so that a simple hinged node structure is formed at the pier bottom; the prefabricated steel pipe concrete pier body 1 is in the bottom section welding a plurality of high-strength connection otic placode 2 (high-strength connection otic placode 2 is right trapezoid's sheet metal, and the right-angle side welds with the periphery wall of pier body) of locating above the cushion cap, and high-strength connection otic placode 2 is connected through high-strength bolt 9 with removable anchor-coupling assembling to realize through nut sleeve 7 and high-strength bolt 8 on the pre-buried anchor end steel sheet 5 in the cushion cap and be connected with the reliable anchor between the cushion cap.
The bottom of the prefabricated concrete-filled steel tube pier body 1 is provided with a bin sealing steel plate 13, and the pier-side high-strength connecting lug plate 2 is reliably connected with the soft steel connecting lug plate 6 on the anchoring-connecting assembly through a high-strength bolt 9; meanwhile, in order to prevent the steel pipe from generating local instability when being stressed, 2-5 layers of annular stiffening steel plates 3 are welded on the inner wall of the prefabricated steel pipe at the position of the high-strength connecting lug plate 2.
The concrete-filled steel tube pier body 1 can be prefabricated in a whole length mode or in a segmented mode, different segments are connected through flanges or welded, the concrete-filled steel tube pier body 1 comprises a steel tube 18 and core concrete 17 poured into the steel tube, and the concrete-filled steel tube pier body is shown in fig. 3.
With reference to fig. 4 and 5, in this embodiment, the replaceable anchoring-connecting assembly includes a circular high-strength steel plate 4 and a soft steel connecting lug 6, the circular high-strength steel plate 4 is formed by splicing four annular steel plates which are divided into four equal parts, a moving groove is formed between each two adjacent annular steel plates, and the replaceable anchoring-connecting assembly can be conveniently replaced and installed according to the damage condition of the assembly after an earthquake; two soft steel connecting lug plates 6 are vertically welded on the upper surface of each annular steel plate, each soft steel connecting lug plate 6 is a right-angled trapezoidal thin plate, the right-angled edge of each soft steel connecting lug plate is welded with the annular steel plate, and the strength of a welding line is required to be not lower than that of a base metal so as to ensure that the assembly does not lose efficacy at the position of the welding line; in addition, in order to be connected with an anchoring bottom steel plate 5 pre-buried in the bearing platform, bolt holes arranged in an annular array are formed in the circular high-strength steel plate 4.
Combine fig. 4, in this embodiment, mild steel connection otic placode 6 adopt low yield point steel processing to form, take the lead to the power consumption of surging under the effect of earthquake load, guarantee as "sacrificial part" and "power consumption part" that concrete filled steel tube pier body 1 does not take place to damage or only slightly harm, open on mild steel connection otic placode 6 surface has the bolt hole, be convenient for with prefabricated concrete filled steel tube pier body on the welded high-strength connection otic placode 2 between carry out detachable bolted connection, realize shake back quick replacement.
Referring to fig. 4, in this embodiment, a plurality of high-strength connecting lug plates 2 are welded to the bottom section of the prefabricated concrete filled steel tube pier body 1, sufficient gaps are reserved between the bottoms of the high-strength connecting lug plates 2 and the upper surfaces of the annular high-strength steel plates 4, and a 45-degree chamfer 14 is arranged in the process of pouring concrete at the periphery of the anchoring base steel plate 5 pre-embedded in the bearing platform, so that the anchoring-connecting assembly can be lifted and moved out in the later replacing process, and after the anchoring-connecting assembly is installed, a waterproof joint compound 15 can be poured along the chamfer.
With reference to fig. 1 and 2, in this embodiment, the cup base shape that can supply prefabricated steel pipe concrete pier shaft 1 to insert the installation that reserves on cushion cap 11 upper portion is the same with prefabricated pier stud, reserves certain clearance between the basic internal surface of cup and the prefabricated pier stud, the bottom of cup base is provided with pre-buried steel sheet 12 (pre-buried steel sheet 12 is perpendicular with the axial lead of steel pipe concrete pier shaft 1) to satisfy the local demand of being pressed in pier shaft bottom, simultaneously in order to realize pier bottom hinge joint structure, packs the pitch hemp cut bedding course between closing storehouse steel sheet 13 and cup base pre-buried steel sheet 12, and the clearance between pier side (the periphery wall of pier shaft) and the cup base also all adopts pitch hemp cut material to fill up.
With reference to fig. 6, in this embodiment, the anchor bottom steel plate 5 pre-embedded in the bearing platform is square, and bolt holes arranged in an annular array are arranged, the annular arrangement mode of the bolt holes is the same as the arrangement mode of the bolt holes arranged on the annular steel plate 4, the bolt holes correspond to one another one by one, and the anchoring bottom steel plate is strictly lofted according to requirements; and the bottom of the bolt hole opened by the anchoring bottom steel plate 5 is provided with a high-strength nut sleeve 7 at the position corresponding to the bolt hole, the nut sleeve 7 is vertical to the bottom surface of the anchoring bottom steel plate 5 and is connected with the anchoring bottom steel plate by welding, the nut sleeve 7 and the anchoring bottom steel plate 5 are both pre-embedded in the bearing platform, and the anchoring bottom steel plate 5 is attached to the circular high-strength steel plate 4 and is vertical to the axial lead of the concrete-filled steel tube pier body 1.
Above-mentioned pier is assembled in prefabrication of removable part, its work progress divide into newly-built bridge and the damaged two kinds of situations that need change after existing bridge shakes, and its concrete implementation scheme's main characteristics and step lie in:
for a newly-built bridge, the main implementation scheme and process are as follows:
(1) the construction method comprises the following steps of constructing a prefabricated steel pipe concrete pier bottom bearing platform 11, binding a bearing platform steel bar, accurately setting out and installing an anchoring bottom steel plate 5 (comprising a high-strength nut sleeve 7 fixedly welded on the bottom surface of the anchoring bottom steel plate 5) embedded in the bearing platform, a cup foundation embedded steel plate 12 and relevant embedded parts thereof, installing a bearing platform template, pouring bearing platform concrete and maintaining to the strength required by design, and prefabricating a steel pipe concrete pier body 1, processing an anchoring-connecting assembly and the like in the basic construction process by parallel operation.
(2) And an asphalt hemp knife 10 cushion layer between the bottom and the inner side wall of the construction bearing platform 11 cup foundation.
(3) And (3) hoisting the prefabricated concrete filled steel tube pier body 1, filling gaps around the prefabricated concrete filled steel tube pier body with an asphalt hemp cutter 10 after the prefabricated concrete filled steel tube pier body is in place, and erecting a temporary support frame around the prefabricated concrete filled steel tube pier body to ensure the stability of the prefabricated concrete filled steel tube pier body in the installation process.
(4) And installing a replaceable anchoring-connecting assembly, and sequentially screwing the high-strength bolt 8 between the circular high-strength steel plate 4 and the anchoring bottom steel plate 5 and the high-strength bolt 9 between the soft steel connecting lug plate 6 and the high-strength connecting lug plate 2.
(5) Installing the upper structure of the bridge, constructing a bridge deck system and other accessory facilities.
For the case of damage after earthquake and need replacement, the main implementation scheme is as follows:
(1) whether the soft steel connection lug plate 6 needs to be replaced is judged according to the damage condition of the soft steel connection lug plate, and the replacement is carried out as follows.
(2) Set up interim diagonal bracing around steel pipe concrete pier shaft 1, guarantee the safety and stability of pier shaft in the change process.
(3) And (3) removing the high-strength bolt 9 between the soft steel connecting lug plate 6 and the high-strength connecting lug plate 2 aiming at the part needing to be replaced.
(4) And (3) dismantling the high-strength bolt 8 between the circular high-strength steel plate 4 and the anchoring bottom steel plate 5 of the anchoring-connecting assembly.
(5) And installing an inserting type lifting hook by using a reserved bolt hole on the soft steel connecting lug plate 6 or symmetrically welding lifting lugs on the circular high-strength steel plate 4, and moving out of the reserved groove after lifting off the surface of the bearing platform by using a crane.
(6) And (3) hoisting a new anchoring-connecting assembly, and sequentially screwing the high-strength bolt 8 between the circular high-strength steel plate 4 and the anchoring bottom steel plate 5 and the high-strength bolt 9 between the soft steel connecting lug plate 6 and the high-strength connecting lug plate 2 to finish the replacement of the anchoring-connecting assembly.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (8)
1. The utility model provides a pier is assembled in prefabrication of removable part which characterized in that: the prefabricated steel pipe concrete pier body (1) is provided with a bearing platform (11) with a reserved cup foundation and is inserted into the reserved cup foundation, a pre-buried steel plate (12) is arranged at the bottom of the bearing platform cup foundation to meet the requirement of local pressure bearing of the prefabricated steel pipe concrete pier bottom, a plurality of high-strength connecting lug plates (2) are welded on a bottom section above the bearing platform of the prefabricated steel pipe concrete pier body (1), the high-strength connecting lug plates (2) are connected with a replaceable anchoring-connecting assembly through high-strength bolts (9), and the replaceable anchoring-connecting assembly is connected with an anchoring bottom steel plate (5) pre-buried in the bearing platform through high-strength bolts (8);
the replaceable anchoring-connecting assembly comprises a circular high-strength steel plate (4) and a soft steel connecting lug plate (6), and the soft steel connecting lug plate (6) is vertically welded on the surface of the circular high-strength steel plate (4); the circular high-strength steel plate (4) is formed by splicing a plurality of equally divided circular steel plates, at least one soft steel connecting lug plate (6) is vertically welded on each circular steel plate, and bolt holes which are arranged in a circular array are distributed in the circular high-strength steel plate (4) and are convenient to be connected with an anchoring bottom steel plate (5) which is pre-embedded in a bearing platform through bolts; the soft steel connecting lug plates (6) are correspondingly connected with the high-strength connecting lug plates (2) one by one through bolts;
the anchoring bottom steel plate (5) pre-embedded in the bearing platform is formed by processing a high-strength steel plate, and bolt holes arranged in an annular array are formed in the anchoring bottom steel plate; the high-strength nut sleeves (7) are arranged at positions corresponding to the bolt holes, the high-strength nut sleeves (7) are connected with the bottom surfaces of the anchoring bottom steel plates (5) in a welding mode, the high-strength nut sleeves and the anchoring bottom steel plates are embedded in the bearing platform together, the bolt holes distributed in the anchoring bottom steel plates (5) and the circular steel plates (4) are arranged in the same mode, the anchoring bottom steel plates and the circular steel plates (5) correspond to one another one by one, and bolts of the anchoring bottom steel plates (5) and the circular steel plates (4) penetrate into the high-strength nut sleeves (7) to be locked and fixed conveniently.
2. The prefabricated assembled pier with replaceable components according to claim 1, wherein: the prefabricated concrete filled steel tube pier body (1) is prefabricated in a whole length mode or in a segmented mode, and different segments prefabricated in a segmented mode are connected through flanges or welded.
3. The prefabricated assembled pier with replaceable components according to claim 1 or 2, wherein: a moving-out groove is formed between the adjacent equally divided annular steel plates, so that the installation or the replacement is convenient; the soft steel connecting lug plate (6) is made of a low-yield-point steel plate, the soft steel connecting lug plate (6) and the high-strength connecting lug plate (2) are trapezoidal, the soft steel connecting lug plate and the high-strength connecting lug plate are closely attached to each other, and reliable connection is achieved through bolt holes in the soft steel connecting lug plate and the high-strength bolts (9).
4. The prefabricated assembled pier with replaceable components as claimed in claim 3, wherein: enough clearance is reserved between the bottom of the high-strength connecting lug plate (2) and the upper surface of the circular high-strength steel plate (4);
the bottom of prefabricated steel pipe concrete mound is provided with a storehouse steel sheet (13), it has pitch hemp cut bed course to fill between storehouse steel sheet (13) and pre-buried steel sheet (12), at prefabricated steel pipe inner wall welding a plurality of annular stiffening steel sheet (3) of high strength connection otic placode (2) position.
5. The prefabricated assembled pier with replaceable components according to claim 1 or 2, wherein: a 45-degree chamfer (14) is arranged on the peripheral concrete of the anchoring bottom steel plate (5) pre-embedded in the bearing platform during pouring, so that the anchoring-connecting assembly can be lifted and moved out in the later replacing process; after the installation of the anchor-connecting assembly is completed, a waterproof joint compound (15) can be poured along the chamfer (14).
6. The prefabricated assembled pier with replaceable components according to claim 1 or 2, wherein: the cup foundation shape that can supply prefabricated steel pipe concrete pier shaft to insert the installation that cushion cap (11) upper portion was reserved is the same with prefabricated steel pipe concrete pier shaft, reserves certain clearance between cup foundation and the prefabricated steel pipe concrete pier shaft, and the clearance between prefabricated steel pipe concrete pier shaft and the cup foundation is whole to adopt pitch hemp sword (10) material to fill up.
7. The prefabricated assembled pier with replaceable components according to claim 1 or 2, wherein: the circular high-strength steel plate (4) is formed by splicing four quartered annular steel plates, and two soft steel connecting lug plates (6) are vertically welded on each annular steel plate.
8. The construction method of the prefabricated assembled pier with the replaceable components according to any one of claims 1 to 7, wherein the construction process is divided into two situations of newly-built bridges and replacement of damaged bridges after earthquake, and the specific implementation scheme is mainly characterized by comprising the following steps:
for a newly-built bridge, the main implementation scheme and process are as follows:
1) constructing a bearing platform (11) at the bottom of the prefabricated steel pipe concrete pier, binding a steel bar of the bearing platform, accurately lofting and installing an anchoring bottom steel plate (5) and an embedded steel plate (12) which are embedded in the bearing platform and relevant embedded parts thereof, installing a bearing platform template, pouring bearing platform concrete and curing to the strength required by design, and performing prefabrication, anchoring and connecting assembly processing on a prefabricated steel pipe concrete pier body (1) in parallel operation in the construction process of the bearing platform;
2) constructing asphalt hemp knife (10) cushions at the bottom and on the inner side wall of the cup mouth foundation of the bearing platform (11);
3) after the prefabricated steel pipe concrete pier body (1) is hoisted in place, the gaps on the periphery are filled with asphalt hemp knives (10), and temporary support frames are erected around the pier body to ensure the stability of the pier in the installation process;
4) installing a replaceable anchoring-connecting assembly, and sequentially screwing a high-strength bolt (8) between the circular high-strength steel plate (4) and the anchoring bottom steel plate (5) and a high-strength bolt (9) between the soft steel connecting lug plate (6) and the high-strength connecting lug plate (2);
5) installing the upper structure of the bridge, constructing a bridge deck system and other accessory facilities;
for the case of damage after earthquake and need replacement, the main implementation scheme is as follows:
1) judging whether the soft steel connecting lug plate (6) needs to be replaced or not according to the damage condition of the soft steel connecting lug plate, and performing the following treatment on the part needing to be replaced;
2) a temporary oblique support is erected around the steel pipe concrete pier body (1), so that the safety and stability of the pier body in the replacement process are ensured;
3) aiming at a certain soft steel connecting lug plate (6) needing to be replaced, a high-strength bolt (9) between the soft steel connecting lug plate (6) and the high-strength connecting lug plate (2) is removed;
4) dismantling a high-strength bolt (8) between the annular high-strength steel plate (4) and the anchoring bottom steel plate (5) of the anchoring-connecting assembly;
5) installing an inserting type lifting hook by using a reserved bolt hole on a soft steel connecting lug plate (6) or symmetrically welding lifting lugs on a circular high-strength steel plate (4), and lifting off from the surface of a bearing platform by using a crane and then moving out;
6) and (3) hoisting a new anchoring-connecting assembly, and sequentially screwing the high-strength bolt (8) between the circular high-strength steel plate (4) and the anchoring bottom steel plate (5) and the high-strength bolt (9) between the soft steel connecting lug plate (6) and the high-strength connecting lug plate (2) to finish the replacement of the anchoring-connecting assembly.
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| CN202111296629.1A CN113931061A (en) | 2021-11-04 | 2021-11-04 | Prefabricated assembled pier with replaceable components and construction method thereof |
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| CN202111296629.1A CN113931061A (en) | 2021-11-04 | 2021-11-04 | Prefabricated assembled pier with replaceable components and construction method thereof |
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|---|---|---|---|---|
| JPH1082016A (en) * | 1996-09-05 | 1998-03-31 | Mitsubishi Heavy Ind Ltd | High-ductility pier |
| CN104895249A (en) * | 2015-06-09 | 2015-09-09 | 华侨大学 | Combined column foot capable of being repaired in situ |
| CN105297616A (en) * | 2015-09-29 | 2016-02-03 | 华侨大学 | Box type steel pier capable of being repaired quickly in situ during earthquake damage |
| CN106400677A (en) * | 2016-11-03 | 2017-02-15 | 华侨大学 | Box type steel bridge pier with earthquake damage capable of being fast restored in situ |
| CN108532447A (en) * | 2018-06-13 | 2018-09-14 | 华侨大学 | The stub structure and bridge that can quickly repair |
| CN108729344A (en) * | 2018-05-28 | 2018-11-02 | 北京工业大学 | A kind of two-columned pier construction waving shock insulation use in conjunction |
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2021
- 2021-11-04 CN CN202111296629.1A patent/CN113931061A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1082016A (en) * | 1996-09-05 | 1998-03-31 | Mitsubishi Heavy Ind Ltd | High-ductility pier |
| CN104895249A (en) * | 2015-06-09 | 2015-09-09 | 华侨大学 | Combined column foot capable of being repaired in situ |
| CN105297616A (en) * | 2015-09-29 | 2016-02-03 | 华侨大学 | Box type steel pier capable of being repaired quickly in situ during earthquake damage |
| CN106400677A (en) * | 2016-11-03 | 2017-02-15 | 华侨大学 | Box type steel bridge pier with earthquake damage capable of being fast restored in situ |
| CN108729344A (en) * | 2018-05-28 | 2018-11-02 | 北京工业大学 | A kind of two-columned pier construction waving shock insulation use in conjunction |
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